Insert three rational numbers between 4 and 4.5.

A rational number between 4 and 4.5 A rational number between 4 and 4.25 A rational number between 4 and 4.125 As, 4 4.0625 4.125 4.25 4.5, therefore three rational numbers between 4 and 4.5 are 4.0625, 4.125, 4.25.